Patent US2566516A successfully refreshed from Google Patents.
US2566516A
Expired / Lapsed
US
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Plastic marking composition
Assignee: Foster Grant Co Inc
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Filing: 1948-11-16
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Granted: 1951-09-04
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Expires: 1968-11-16
Abstract
No abstract record available.
Inventors
- 👤 Elmer R Derby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:52
CPC Classifications
C; C09; C09D; C09D13/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
A PLASTIC MARKING COMPOSITION CONSISTING SUBSTANTIALLY OF ABOUT 10%-17% BY WEIGHT POLYVINYL BUTYRAL, ABOUT 23%-35% BY WEIGHT N-CETYL ACETAMIDE, ABOUT 2% BY WEIGHT STEARIC ACID, ABOUT 38%-45% BY WEIGHT CLAY, AND ABOUT 15%-20% BY WEIGHT COLORING MATTER.
Claim 2
Dependent Claim
37 words
A PLASTIC MARKING COMPOSITION CONSISTING SUBSTANTIALLY OF ABOUT 10%-17% BY WEIGHT POLYVINYL BUTYRAL, ABOUT 23%-35% BY WEIGHT N-CETYL ACETAMIDE, ABOUT 2% BY WEIGHT STEARIC ACID, ABOUT 38%-45% BY WEIGHT CLAY, AND ABOUT 15%-20% BY WEIGHT COLORING MATTER.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-03 | 1955-03-05 | 1955-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-03 | 1959-03-05 | 1959-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-03 | 1963-03-05 | 1963-09-04 | $7700.00 | Window Closed / Lapsed |